import cn.nukkit.blockentity.BlockEntityComparator; //导入依赖的package包/类
@Override
public void updateState() {
    if (!this.level.isUpdateScheduled(this, this)) {
        int output = this.calculateOutput();
        BlockEntity blockEntity = this.level.getBlockEntity(this);
        int power = blockEntity instanceof BlockEntityComparator ? ((BlockEntityComparator) blockEntity).getOutputSignal() : 0;

        if (output != power || this.isPowered() != this.shouldBePowered()) {
            /*if(isFacingTowardsRepeater()) {
                this.level.scheduleUpdate(this, this, 2, -1);
            } else {
                this.level.scheduleUpdate(this, this, 2, 0);
            }*/

            this.level.scheduleUpdate(this, this, 2);
        }
    }
}
 

import cn.nukkit.blockentity.BlockEntityComparator; //导入依赖的package包/类
private void onChange() {
    int output = this.calculateOutput();
    BlockEntity blockEntity = this.level.getBlockEntity(this);
    int currentOutput = 0;

    if (blockEntity instanceof BlockEntityComparator) {
        BlockEntityComparator blockEntityComparator = (BlockEntityComparator) blockEntity;
        currentOutput = blockEntityComparator.getOutputSignal();
        blockEntityComparator.setOutputSignal(output);
    }

    if (currentOutput != output || getMode() == Mode.COMPARE) {
        boolean shouldBePowered = this.shouldBePowered();
        boolean isPowered = this.isPowered();

        if (isPowered && !shouldBePowered) {
            this.level.setBlock(this, getUnpowered(), true, false);
        } else if (!isPowered && shouldBePowered) {
            this.level.setBlock(this, getPowered(), true, false);
        }

        this.level.updateAroundRedstone(this, null);
    }
}
 

import cn.nukkit.blockentity.BlockEntityComparator; //导入依赖的package包/类
@Override
public boolean place(Item item, Block block, Block target, BlockFace face, double fx, double fy, double fz, Player player) {
    if (super.place(item, block, target, face, fx, fy, fz, player)) {
        CompoundTag nbt = new CompoundTag()
                .putList(new ListTag<>("Items"))
                .putString("id", BlockEntity.COMPARATOR)
                .putInt("x", (int) this.x)
                .putInt("y", (int) this.y)
                .putInt("z", (int) this.z);
        new BlockEntityComparator(this.level.getChunk((int) this.x >> 4, (int) this.z >> 4), nbt);

        onUpdate(Level.BLOCK_UPDATE_REDSTONE);
        return true;
    }

    return false;
}
 

import cn.nukkit.blockentity.BlockEntityComparator; //导入依赖的package包/类
@Override
public void updateState() {
    if (!this.level.isUpdateScheduled(this)) {
        int output = this.calculateOutput();
        BlockEntity blockEntity = this.level.getBlockEntity(this);
        int power = blockEntity instanceof BlockEntityComparator ? ((BlockEntityComparator) blockEntity).getOutputSignal() : 0;

        if (output != power || this.isPowered() != this.shouldBePowered()) {
            this.level.scheduleUpdate(this, 2);
        }
    }
}
 

import cn.nukkit.blockentity.BlockEntityComparator; //导入依赖的package包/类
@Override
protected int getRedstoneSignal() {
    BlockEntity blockEntity = this.level.getBlockEntity(this);

    return blockEntity instanceof BlockEntityComparator ? ((BlockEntityComparator) blockEntity).getOutputSignal() : 0;
}